home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
CD School House 10
/
CD School House - Education and Games (10.0) - Wayzata Technology (1995).iso
/
mac
/
DOS
/
MATH
/
TEEOTE
/
CALCIUM.ASC
< prev
next >
Wrap
Text File
|
1992-07-13
|
636b
|
18 lines
CALCIUM
Atomic symbol - Ca
Atomic weight - 40.078
Atomic number - 20
Electron configuration - 2-8-8-2
Oxidation states - +2
State of matter - solid
Light metal
Discovered in 1808 by Sir Humphry Davy
Boils at 1484 °C, melts at 839 °C
Notes:
Calcium is just behind aluminum and iron in the list of abundant metals, and
makes up 3% of the Earth's crust. Calcium Carbonate can be found as limestone,
marble, chalk seashells, and calcite. It is found as dolomite when combined
with magnesium. Calcium is a good reducing agent and forms heavy hydroxide
coats with contact with moist air.